Something practical, and it’s free.
Most teams will tell you their AI system is auditable. Ask for the folder.
Not the dashboard. Not the deck. The folder you’d hand an auditor who asked why the agent did that, for one specific decision, on a Tuesday.
I put one together. One ID that ties every record from a single decision together, and everything that hangs off it: the decision trace step by step, the evidence each step leaned on, the policy it was evaluated against with its version, the schemas for the trace and the evidence with their hashes, pointers into the logs, and the signing key and software bills of materials for the services involved. About 230 KB zipped.
It’s a worked example, not a product. The point is the diff. Pull it down, open each file, and ask one question: could we produce this today, for any decision, on demand? Every no is a line in your governance backlog.
The schemas are deliberately boring. Versioned, hash-summed, minimal. Steal them.
Ungated and free to reuse. The packet is linked below.